Application-level switching server for internet protocol (IP) based networks

• US 6,704,311 B1
• Filed: 06/25/1999
• Issued: 03/09/2004
• Est. Priority Date: 06/25/1999
• Status: Expired due to Term

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Yue, On-Ching, Yan, Anlu, Doshi, Bharat Tarachand, Chuah, Mooi Choo
• Primary Examiner(s): Yao, Kwang Bin
• Application Number:
  US09/344,781
• Time in Patent Office: 1,719 Days
• Field of Search: 370/469, 370/473, 370/465, 370/470, 370/471, 370/474, 370/349, 370/389, 370/395.5, 370/395.52, 370/537, 370/538, 370/539, 370/540
• US Class Current: 370/389
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 67/00 Network arrangements or protocols for supporting network services or applications user-to-user messaging H04L51/00; network arrangements, protocols or services for supporting real-time applications in data packet communications networks H04L65/00
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

An Internet Protocol (IP)-based network incorporates an application level switching server and a number of packet endpoints. A packet endpoint multiplexes application sessions destined for different packet endpoints into one multiplexed session that is terminated with the application level switching server. The latter extracts each application session (or packets associated therewith) and repackages, or switches, them into other multiplexed sessions such that at least two switched packets are transmitted to different packet endpoints. The multiplexed sessions utilize either RTP/UDP/IP or UDP/IP encapsulation.

Claims

1. A method for use in a packet endpoint, the method comprising the step of:

receiving a stream of mini-packets encapsulated within a larger Internet Protocol based (IP) packet, the larger IP based packet associated with a first multiplexed session, each mini-packet associated with a particular application session, wherein each mini-packet may pertain to a different user;

routing each received mini-packet as a function of application layer routing information that associates header information from each received mini-packet with an other multiplexed session such that at least two mini-packets are routed to different multiplexed sessions whereby application sessions associated with the first multiplexed session are re-packed into other multiplexed sessions, wherein said header information includes a reduced size header relative said IP based packet including user identification information and not including a destination address.

2. The method of claim 1 wherein the larger packet is formatted in accordance with a User Datagram Protocol/Internet Protocol (UDP/IP).

3. The method of claim 1 wherein the mini-packet is formatted in accordance with a lightweight encapsulation protocol (LIPE).

4. The method of claim 3 wherein the larger packet is formated in accordance with Real Time Protocol/User Datagram Protocol/Internet Protocol (RTP/UDP/IP).

5. The method of claim 1 further comprising the step of updating the routing information by monitoring signaling information related to the setting up of the particular application session prior to the routing step.

6. The method of claim 1 wherein the routing step comprises the steps of:

recovering header information from each received mini-packet;

indexing a routing table to recover an associated destination IP address, type of service, and multiplexed session for routing each received mini-packet to its associated multiplexed session.

7. The method of claim 1, wherein the mini packets correspond to voice packets.

8. An improved router for use in an Internet Protocol (IP) based packet network comprising a plurality of base stations and a plurality of packet endpoints wherein each base station communicates application session information with at least two of the packet endpoints, the improvement comprising:

a memory for storing routing information; and

a processor for processing a received stream of mini-packets encapsulated within a larger Internet Protocol based (IP) packet, the larger IP based packet associated with a multiplexed session between the improved router and one of the plurality of base stations, each mini-packet associated with a particular application session, wherein each mini-packet may pertain to a different user, wherein the processing re-packs each received mini-packet into other multiplexed sessions which are associated with the at least two packet endpoints,

wherein the re-packing is performed as a function of application layer routing information, which associates header information from each received mini-packet with the respective multiplexed session associated with one of the at least two packet endpoints, wherein said header information includes a reduced size header relative said IP based packet including user identification information and not including a destination address.

9. The improved router of claim 8 wherein the larger packet is formatted in accordance with a User Datagram Protocol/Internet Protocol (UDP/IP).

10. The improved router of claim 8 wherein the mini-packets are formatted in accordance with a lightweight encapsulation protocol (LIPE).

11. The improved router of claim 8 wherein the larger packet is formatted in accordance with Real Time Protocol/User Datagram Protocol/Internet Protocol (RTP/UDP/IP).

12. The improved router of claim 8 wherein the processor updates the routing information of mini-packets by monitoring signaling information related to the setting up of the particular application session.

13. The improved router of claim 8 wherein the routing information associates a particular value of received mini-packet header information with a destination IP address of one of the packet endpoints, type of service, and corresponding multiplexed session.

14. The router of claim 8, wherein the mini packets correspond to voice packets.

15. A method for use in a packet endpoint, the method comprising the steps of:

receiving a stream of mini-packets encapsulated within a larger Internet Protocol based (IP) packet, the larger IP based packet associated with a first multiplexed session, each mini-packet associated with a particular application session;

routing each received mini-packet as a function of routing information that associates header information from each received mini-packet with an other multiplexed session such that at least two mini-packets are routed to different multiplexed sessions whereby application sessions associated with the first multiplexed session are re-packed into other multiplexed sessions, wherein the mini-packet is formatted in accordance with a lightweight encapsulation protocol (LIPE).

16. An improved router for use in an Internet Protocol (IP) based packet network comprising a plurality of base stations and a plurality of packet endpoints wherein each base station communicates application session information with at least two of the packet endpoints, the improvement comprising:

a memory for storing routing information; and

a processor for processing a received stream of mini-packets encapsulated within a larger Internet Protocol based (IP) packet, the larger IP based packet associated with a multiplexed session between the improved router and one of the plurality of base stations, each mini-packet associated with a particular application session, wherein the processing re-packs each received mini-packet into other multiplexed sessions which are associated with the at least two packet endpoints,

wherein the re-packing is performed as a function of the routing information, which associates header information from each received mini-packet with the respective multiplexed session associated with one of the at least two packet endpoints, wherein the mini-packets are formatted in accordance with a lightweight encapsulation protocol (LIPE).